Suzuki 2009 LT-A500XP, Service Manual

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Engine General Information and Diagnosis: 1A-2
Injection Stop Control
Self-Diagnosis Function
The self-diagnosis function is incorporated in the ECM. The function has two modes, “User mode” and “Dealer mode”.
The user can only be notified by the LCD (DISPLAY) panel and LED (FI indicator light). To check the function of the
individual FI system devices, the dealer mode is prepared. In this check, the special tool is necessary to read the code
of the malfunction items.
User Mode
*1
Current letter displayed any one of the clock/hour meter.
*2
When one of the signals is not received by ECM, the fail-safe circuit works and injection is not stopped. In this case,
“FI” and clock/hour meter (*1) are indicated in the LCD panel and vehicle can run.
*3
The injection signal is stopped, when the crankshaft position sensor signal, tip-over sensor signal, ignition signal,
injector signal, fuel pump relay signal or ignition switch signal is not sent to ECM. In this case, “FI” is indicated in the
LCD panel. Vehicle does not run.
“CHEC”:
The LCD panel indications “CHEC” when no communication signal from the ECM is received for 3 seconds.
For Example:
The ignition switch is turned ON, and the engine stop switch is turned OFF. In this case, the speedometer does not
receive any signal form ECM, and the panel indicates “CHEC”.
If “CHEC” is indicated, the LCD does not indicate the trouble code. It is necessary to check the wiring harness
between ECM and speedometer couplers.
The possible cause of this indication is as follows;
Engine stop switch is in OFF position. Ignition fuse is burnt.
NOTE
The FI light turns ON 2 seconds after the ignition switch turns ON.
Signal Descriptions
TIP-OVER SENSOR SIGNAL (FUEL SHUT-OFF)
When the vehicle tips over, the tip-over sensor sends a signal to
the ECM. Then, this signal cuts OFF current supplied to the fuel
pump, fuel injectors and ignition coils.
OVER-REV. LIMITER SIGNAL
The fuel injector stops operation when engine rpm reaches rev.
limit rpm.
Malfunction
LCD (display) indication
“A”
FI indicator light indication
“B”
Indication mode
“NO” Clock/Hour meter *1 — —
“YES”
Engine can
start
Clock/Hour meter (*1) and
“FI” letters *2
FI indicator light turns ON.
Each 2 sec. Odometer (*1)
and “FI” is indicated
alternately.
Engine can
not start
“FI” letters *3
FI indicator light turns ON
and blinks.
“FI” is indicated continuously.
“B”
“A”
I931H1110001-03